<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8"/>
    <title>Title</title>
</head>
<body>
    <ul>
        <li id = 'l1' class="c1">广州</li>
        <li id = 'l2' class="c2">深圳</li>
        <li>东莞</li>
        <li>佛山</li>
    </ul>

</body>
</html>